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R.C.D. Immobilising Electrical Appliances.

They should be banned. Any electrical appliance that immobilises an installation R.C.D. should not be made. The deficiency should be engineered out of the design of the appliance. Imagine a loved one being electrocuted in the garden because the house R.C.D. was blinded and became inoperable by the vari-speed motor washing machine.

Imagine adding an accessory to your car and then finding that the brakes don't work. It is the same situation.

BAN 'EM.

Chairman, Safe Solid Earthing Association, Milton Keynes. Head Office, over horse meat shop in the Balls Pond Road.

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0 broadgage over 4 years ago

A surprising number of appliances draw DC current from AC mains. Examples include.
Hair dryers, mains on the element for full heat, mains via a silicon power diode for half heat.
Rice cookers, as above.
Slow cooking pots, mains via a diode for lowest heat setting.
Multi voltage travel kettles. Mains onto element for 110/120 volt supply. Mains via power diode for 220/240 volt supply.
Some Christmas lights, negative mains half cycles operate some lamps, positive half cycles operates the others. Gives various patterns and chases with fewer wires.
Some old style Belisha beacons at road crossings. Thermal lamp flasher shunted by a silicon power diode. Flashes dim/bright rather than on/off. The 50 cycle flicker made the lights more eye catching.
Some old style traffic signals. Straight mains onto the signal lamps during the day. At night mains via a diode shunted with a resistance. Diming at night reduces glare and prolongs lamp life.
Vintage valve radio sets. HT obtained by half wave rectification of the mains.
Some older TV sets that used some valves and also transistors. Valve heaters in a series chain connected to the mains via a silicon diode. Lower heat production than a dropper resistance.
Crude battery charging circuits for 240 volt nominal batteries. Half wave rectifier from the mains, with a 110/120 volt lamp to limit the charging current. Change the lamp for one of a different wattage to adjust the charging current.
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0 broadgage over 4 years ago

A surprising number of appliances draw DC current from AC mains. Examples include.
Hair dryers, mains on the element for full heat, mains via a silicon power diode for half heat.
Rice cookers, as above.
Slow cooking pots, mains via a diode for lowest heat setting.
Multi voltage travel kettles. Mains onto element for 110/120 volt supply. Mains via power diode for 220/240 volt supply.
Some Christmas lights, negative mains half cycles operate some lamps, positive half cycles operates the others. Gives various patterns and chases with fewer wires.
Some old style Belisha beacons at road crossings. Thermal lamp flasher shunted by a silicon power diode. Flashes dim/bright rather than on/off. The 50 cycle flicker made the lights more eye catching.
Some old style traffic signals. Straight mains onto the signal lamps during the day. At night mains via a diode shunted with a resistance. Diming at night reduces glare and prolongs lamp life.
Vintage valve radio sets. HT obtained by half wave rectification of the mains.
Some older TV sets that used some valves and also transistors. Valve heaters in a series chain connected to the mains via a silicon diode. Lower heat production than a dropper resistance.
Crude battery charging circuits for 240 volt nominal batteries. Half wave rectifier from the mains, with a 110/120 volt lamp to limit the charging current. Change the lamp for one of a different wattage to adjust the charging current.
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R.C.D. Immobilising Electrical Appliances.

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